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2. Paddle wheel - Wikipedia

   en.wikipedia.org/wiki/Paddle_wheel

   The paddle wheel is a device for converting between rotary motion of a shaft and linear motion of a fluid. In the linear-to-rotary direction, it is placed in a fluid stream to convert the linear motion of the fluid into rotation of the wheel. Such a rotation can be used as a source of power, or as an indication of the speed of flow.

3. Water aeration - Wikipedia

   en.wikipedia.org/wiki/Water_aeration

   The effectiveness of a surface aerator is limited to a small area as they are unable to add circulation or oxygen to much more than a 3-metre radius. This circulation and oxygenating is then limited to the uppermost portion of the water column, often leaving the bottom portions unaffected. Low speed surface aerators can also be installed on floats.

4. Raceway pond - Wikipedia

   en.wikipedia.org/wiki/Raceway_pond

   Raceway pond used for the cultivation of microalgae. The water is kept in constant motion with a powered paddle wheel. A raceway pond is a shallow artificial pond used in the cultivation of algae. [1] [2] The pond is divided into a rectangular grid, with each rectangle containing one channel in the shape of an oval, like an automotive raceway ...

5. Water wheel - Wikipedia

   en.wikipedia.org/wiki/Water_wheel

   A water wheel in Erlangen, Germany The reversible water wheel powering a mine hoist in De re metallica (Georgius Agricola, 1566) The sound of the Otley waterwheel, at Manchester Museum of Science and Industry. A water wheel is a machine for converting the kinetic energy of flowing or falling water into useful forms of power, often in a watermill.

6. Trump laughs off the idea that Elon Musk is usurping him ...

   www.aol.com/trump-addresses-elon-musks-growing...

   This foldable storage shelf is on sale for under $60: 'It is like a magic act' AOL. Shop the best New Year's Amazon deals for big savings on Apple, Ninja, Keurig and more. See all deals.

7. Paddle steamer - Wikipedia

   en.wikipedia.org/wiki/Paddle_steamer

   A typical river paddle steamer from the 1850s. Fall Line's steamer Providence, launched 1866 Finlandia Queen, a paddle-wheel ship from 1990s in Tampere, Finland [1]. A paddle steamer is a steamship or steamboat powered by a steam engine driving paddle wheels to propel the craft through the water.

8. Should You Use Ice or Heat for Your Back Pain? - AOL

   www.aol.com/ice-heat-back-pain-133000090.html

   Experts explain whether ice or heat for back pain will lead to better relief, and the best time to use each.

9. Is Your Dog Stressed? 5 Signs to Watch for and How to Help - AOL

   www.aol.com/dog-stressed-5-signs-watch-151500398...

   Get organizers for all of your Christmas decorations on sale now for as low as $10. AOL. This foldable storage shelf is on sale for under $60: 'It is like a magic act' AOL.